处理临时文件流 [英] Handling with temporary file stream

问题描述

说我想定义一个TempFileStream类，该类使用Path.GetTempFileName（）方法创建一个临时文件。当不再需要TempFileStream对象时，例如，必须删除一个临时文件。关闭或处置：

Say I want to define a TempFileStream class that creates a temporary file using Path.GetTempFileName() method. A temporary file must be deleted when TempFileStream's object is no longer needed, e.g. closed or disposed:

class TempFileStream: FileStream
{
  string m_TempFileName = Path.GetTempFileName();
  public TempFileStream(FileMode fileMode): base(m_TempFileName,fileMode) {}

  /// ...

 public ovverride Dispose(bool disposing)
 {
   /// ???
 }

}   

我应该如何简单地实现此目标？安全吗？

How should I implement this simply and safely?

推荐答案

尝试以下方法：

public class TempFileStream : FileStream
{
    public TempFileStream()
        : base(Path.GetTempFileName(), FileMode.Create, FileAccess.ReadWrite, FileShare.Read, 4096, FileOptions.DeleteOnClose) { }
    public TempFileStream(FileAccess access)
        : base(Path.GetTempFileName(), FileMode.Create, access, FileShare.Read, 4096, FileOptions.DeleteOnClose) { }
    public TempFileStream(FileAccess access, FileShare share)
        : base(Path.GetTempFileName(), FileMode.Create, access, share, 4096, FileOptions.DeleteOnClose) { }
    public TempFileStream(FileAccess access, FileShare share, int bufferSize)
        : base(Path.GetTempFileName(), FileMode.Create, access, share, bufferSize, FileOptions.DeleteOnClose) { }
}

FileOptions.DeleteOnClose选项将确保操作系统删除临时文件自动通常在您关闭文件时。不需要特殊的Dispose方法，因为它已经为您照顾好了。

The FileOptions.DeleteOnClose option will ensure that the OS deletes the temporary file automatically when you close out the file. No need for a special Dispose method, because it's all taken care of for you.

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